In the Docker environment, images are identified through repositories, tags, and image IDs, although tags are often used for ease of identification. Tags in Docker are akin to symbolic links in Unix-based systems, providing a reference to specific image commits or IDs, with "latest" being a common default tag rather than indicating the most recent update. Docker allows users to assign multiple tags to a single image, facilitating easier management and identification without altering the image itself, similar to how a person might have multiple nicknames. Docker's image caching enhances its efficiency by recognizing images already stored in the cache, preventing redundant downloads. Additionally, platforms like Codefresh offer robust metadata management for Docker images, allowing users to view and update tags, track changes, and access various image details such as SHA, branch information, and build logs, thereby streamlining the deployment process.